1. 26 Jan, 2012 3 commits
  2. 25 Jan, 2012 4 commits
  3. 24 Jan, 2012 8 commits
    • Paul Walmsley's avatar
      tty: serial: OMAP: transmit FIFO threshold interrupts don't wake the chip · 43cf7c0b
      Paul Walmsley authored
      It seems that when the transmit FIFO threshold is reached on OMAP
      UARTs, it does not result in a PRCM wakeup.  This appears to be a
      silicon bug.  This means that if the MPU powerdomain is in a low-power
      state, the MPU will not be awakened to refill the FIFO until the next
      interrupt from another device.
      
      The best solution, at least for the short term, would be for the OMAP
      serial driver to call a OMAP subarchitecture function to prevent the
      MPU powerdomain from entering a low power state while the FIFO has
      data to transmit.  However, we no longer have a clean way to do this,
      since patches that add platform_data function pointers have been
      deprecated by the OMAP maintainer.  So we attempt to work around this
      as well.  The workarounds depend on the setting of CONFIG_CPU_IDLE.
      
      When CONFIG_CPU_IDLE=n, the driver will now only transmit one byte at
      a time.  This causes the transmit FIFO threshold interrupt to stay
      active until there is no more data to be sent.  Thus, the MPU
      powerdomain stays on during transmits.  Aside from that energy
      consumption penalty, each transmitted byte results in a huge number of
      UART interrupts -- about five per byte.  This wastes CPU time and is
      quite inefficient, but is probably the most expedient workaround in
      this case.
      
      When CONFIG_CPU_IDLE=y, there is a slightly more direct workaround:
      the PM QoS constraint can be abused to keep the MPU powerdomain on.
      This results in a normal number of interrupts, but, similar to the
      above workaround, wastes power by preventing the MPU from entering
      WFI.
      
      Future patches are planned for the 3.4 merge window to implement more
      efficient, but also more disruptive, workarounds to these problems.
      
      DMA operation is unaffected by this patch.
      Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
      Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
      Cc: Govindraj Raja <govindraj.r@ti.com>
      Cc: Kevin Hilman <khilman@ti.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      43cf7c0b
    • Paul Walmsley's avatar
      tty: serial: OMAP: ensure FIFO levels are set correctly in non-DMA mode · 0a697b22
      Paul Walmsley authored
      Ensure FIFO levels are set correctly in non-DMA mode (the default).
      This patch will cause a receive FIFO threshold interrupt to be raised when
      there is at least one byte in the RX FIFO.  It will also cause a transmit
      FIFO threshold interrupt when there is only one byte remaining in the TX
      FIFO.
      
      These changes fix the receive interrupt problem and part of the
      transmit interrupt problem.  A separate set of issues must be worked
      around for the transmit path to have a basic level of functionality; a
      subsequent patch will address these.
      
      DMA operation is unaffected by this patch.
      Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
      Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
      Cc: Govindraj Raja <govindraj.r@ti.com>
      Cc: Kevin Hilman <khilman@ti.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      0a697b22
    • Shubhrajyoti D's avatar
      omap-serial: make serial_omap_restore_context depend on CONFIG_PM_RUNTIME · b5148856
      Shubhrajyoti D authored
      The function serial_omap_restore_context is called only from
      serial_omap_runtime_resume which depends on CONFIG_PM_RUNTIME. Make
      serial_omap_restore_context also compile conditionally.
      
      if CONFIG_PM_RUNTIME is not defined below warn may be seen.
      
        LD      net/xfrm/built-in.o
      drivers/tty/serial/omap-serial.c:1524: warning: 'serial_omap_restore_context' defined but not used
        CC      drivers/tty/vt/selection.o
      Acked-by: default avatarGovindraj.R <govindraj.raja@ti.com>
      Signed-off-by: default avatarShubhrajyoti D <shubhrajyoti@ti.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      b5148856
    • Shubhrajyoti D's avatar
      omap-serial :Make the suspend/resume functions depend on CONFIG_PM_SLEEP. · 3bc4f0d8
      Shubhrajyoti D authored
          The macro SET_SYSTEM_SLEEP_PM_OPS  depends CONFIG_PM_SLEEP. The patch
          defines the suspend and resume functions for CONFIG_PM_SLEEP instead of
          CONFIG_SUSPEND.
      Signed-off-by: default avatarShubhrajyoti D <shubhrajyoti@ti.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      3bc4f0d8
    • Jiri Slaby's avatar
      TTY: fix UV serial console regression · 0eee50af
      Jiri Slaby authored
      Commit 74c21077 (serial: Use block_til_ready helper) and its fixup
      3f582b8c (serial: fix termios settings in open) introduced a
      regression on UV systems. The serial eventually freezes while being
      used. It's completely unpredictable and sometimes needs a heap of
      traffic to happen first.
      
      To reproduce this, yast installation was used as it turned out to be
      pretty reliable in reproducing. Especially during installation process
      where one doesn't have an SSH daemon running. And no monitor as the HW
      is completely headless. So this was fun to find. Given the machine
      doesn't boot on vanilla before 2.6.36 final. (And the commits above
      are older.)
      
      Unless there is some bad race in the code, the hardware seems to be
      pretty broken. Otherwise pure MSR read should not cause such a bug,
      or?
      
      So to prevent the bug, revert to the old behavior. I.e. read modem
      status only if we really have to -- for non-CLOCAL set serials.
      Non-CLOCAL works on this hardware OK, I tried. See? I don't.
      
      And document that shit.
      Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
      Cc: stable <stable@vger.kernel.org>
      References: https://lkml.org/lkml/2011/12/6/573
      References: https://bugzilla.novell.com/show_bug.cgi?id=718518Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      0eee50af
    • Lucas Kannebley Tavares's avatar
      jsm: Fixed EEH recovery error · 26aa38ca
      Lucas Kannebley Tavares authored
      There was an error on the jsm driver that would cause it to be unable to
      recover after a second error is detected.
      
      At the first error, the device recovers properly:
      
      [72521.485691] EEH: Detected PCI bus error on device 0003:02:00.0
      [72521.485695] EEH: This PCI device has failed 1 times in the last hour:
      ...
      [72532.035693] ttyn3 at MMIO 0x0 (irq = 49) is a jsm
      [72532.105689] jsm: Port 3 added
      
      However, at the second error, it cascades until EEH disables the device:
      
      [72631.229549] Call Trace:
      ...
      [72641.725687] jsm: Port 3 added
      [72641.725695] EEH: Detected PCI bus error on device 0003:02:00.0
      [72641.725698] EEH: This PCI device has failed 3 times in the last hour:
      
      It was caused because the PCI state was not being saved after the first
      restore. Therefore, at the second recovery the PCI state would not be
      restored.
      Signed-off-by: default avatarLucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com>
      Signed-off-by: default avatarBreno Leitao <brenohl@br.ibm.com>
      Acked-by: default avatarThadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
      Cc: stable <stable@vger.kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      26aa38ca
    • Lucas Kannebley Tavares's avatar
      Updated TTY MAINTAINERS info · 8dd5d2f1
      Lucas Kannebley Tavares authored
      Greg Kroah-Hartman is the current TTY maintainer, however he wouldn't appear
      listed as such upon running get_maintainers.pl for drivers under
      drivers/tty/serial.
      Signed-off-by: default avatarLucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      8dd5d2f1
    • Paul Gortmaker's avatar
      serial: group all the 8250 related code together · 9bef3d41
      Paul Gortmaker authored
      The drivers/tty/serial dir is already getting rather busy.
      Relocate the 8250 related drivers to their own subdir to
      reduce the clutter.
      
      Note that sunsu.c is not included in this move -- it is
      8250-like hardware, but it does not use any of the existing
      infrastructure -- and does not depend on SERIAL_8250.
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      9bef3d41
  4. 19 Jan, 2012 16 commits
  5. 18 Jan, 2012 9 commits
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 4ba3069f
      Linus Torvalds authored
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (26 commits)
        target: Set additional sense length field in sense data
        target: Remove legacy device status check from transport_execute_tasks
        target: Remove __transport_execute_tasks() for each processing context
        target: Remove extra se_device->execute_task_lock access in fast path
        target: Drop se_device TCQ queue_depth usage from I/O path
        target: Fix possible NULL pointer with __transport_execute_tasks
        target: Remove TFO->check_release_cmd() fabric API caller
        tcm_fc: Convert ft_send_work to use target_submit_cmd
        target: Add target_submit_cmd() for process context fabric submission
        target: Make target_put_sess_cmd use target_release_cmd_kref
        target: Set response format in INQUIRY response
        target: tcm_mod_builder: small fixups
        Documentation/target: Fix tcm_mod_builder.py build breakage
        target: remove overagressive ____cacheline_aligned annoations
        tcm_loop: bump max_sectors
        target/configs: remove trailing newline from udev_path and alias
        iscsi-target: fix chap identifier simple_strtoul usage
        target: remove useless casts
        target: simplify target_check_cdb_and_preempt
        target: Move core_scsi3_check_cdb_abort_and_preempt
        ...
      4ba3069f
    • Linus Torvalds's avatar
      Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux · 507a03c1
      Linus Torvalds authored
      This includes initial support for the recently published ACPI 5.0 spec.
      In particular, support for the "hardware-reduced" bit that eliminates
      the dependency on legacy hardware.
      
      APEI has patches resulting from testing on real hardware.
      
      Plus other random fixes.
      
      * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (52 commits)
        acpi/apei/einj: Add extensions to EINJ from rev 5.0 of acpi spec
        intel_idle: Split up and provide per CPU initialization func
        ACPI processor: Remove unneeded variable passed by acpi_processor_hotadd_init V2
        ACPI processor: Remove unneeded cpuidle_unregister_driver call
        intel idle: Make idle driver more robust
        intel_idle: Fix a cast to pointer from integer of different size warning in intel_idle
        ACPI: kernel-parameters.txt : Add intel_idle.max_cstate
        intel_idle: remove redundant local_irq_disable() call
        ACPI processor: Fix error path, also remove sysdev link
        ACPI: processor: fix acpi_get_cpuid for UP processor
        intel_idle: fix API misuse
        ACPI APEI: Convert atomicio routines
        ACPI: Export interfaces for ioremapping/iounmapping ACPI registers
        ACPI: Fix possible alignment issues with GAS 'address' references
        ACPI, ia64: Use SRAT table rev to use 8bit or 16/32bit PXM fields (ia64)
        ACPI, x86: Use SRAT table rev to use 8bit or 32bit PXM fields (x86/x86-64)
        ACPI: Store SRAT table revision
        ACPI, APEI, Resolve false conflict between ACPI NVS and APEI
        ACPI, Record ACPI NVS regions
        ACPI, APEI, EINJ, Refine the fix of resource conflict
        ...
      507a03c1
    • Stefan Berger's avatar
      tpm: fix (ACPI S3) suspend regression · be405411
      Stefan Berger authored
      This patch fixes an (ACPI S3) suspend regression introduced in commit
      68d6e671 ("tpm: Introduce function to poll for result of self test")
      and occurring with an Infineon TPM and tpm_tis and tpm_infineon drivers
      active.
      
      The suspend problem occurred if the TPM was disabled and/or deactivated
      and therefore the TPM_PCRRead checking the result of the (asynchronous)
      self test returned an error code which then caused the tpm_tis driver to
      become inactive and this then seemed to have negatively influenced the
      suspend support by the tpm_infineon driver...  Besides that the tpm_tis
      drive may stay active even if the TPM is disabled and/or deactivated.
      Signed-off-by: default avatarStefan Berger <stefanb@linux.vnet.ibm.com>
      Tested-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      Acked-by: default avatarRajiv Andrade <srajiv@linux.vnet.ibm.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      be405411
    • Linus Torvalds's avatar
      nvme: fix merge error due to change of 'make_request_fn' fn type · 93c3d65b
      Linus Torvalds authored
      The type of 'make_request_fn' changed in 5a7bbad2 ("block: remove
      support for bio remapping from ->make_request"), but the merge of the
      nvme driver didn't take that into account, and as a result the driver
      would compile with a warning:
      
        drivers/block/nvme.c: In function 'nvme_alloc_ns':
        drivers/block/nvme.c:1336:2: warning: passing argument 2 of 'blk_queue_make_request' from incompatible pointer type [enabled by default]
        include/linux/blkdev.h:830:13: note: expected 'void (*)(struct request_queue *, struct bio *)' but argument is of type 'int (*)(struct request_queue *, struct bio *)'
      
      It's benign, but the warning is annoying.
      Reported-by: default avatarStephen Rothwell <sfr@canb.auug.org>
      Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      93c3d65b
    • Stephen Rothwell's avatar
      xen: using EXPORT_SYMBOL requires including export.h · 9ef9b20b
      Stephen Rothwell authored
      Fix these warnings:
      
        drivers/xen/biomerge.c:14:1: warning: data definition has no type or storage class [enabled by default]
        drivers/xen/biomerge.c:14:1: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' [-Wimplicit-int]
        drivers/xen/biomerge.c:14:1: warning: parameter names (without types) in function declaration [enabled by default]
      
      And this build error:
      
        ERROR: "xen_biovec_phys_mergeable" [drivers/block/nvme.ko] undefined!
      Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9ef9b20b
    • Linus Torvalds's avatar
      Merge branch 'for-linus/i2c-33' of git://git.fluff.org/bjdooks/linux · aa303f2c
      Linus Torvalds authored
      * 'for-linus/i2c-33' of git://git.fluff.org/bjdooks/linux:
        i2c-eg20t: Change-company-name-OKI-SEMICONDUCTOR to LAPIS Semiconductor
        i2c-eg20t: Support new device LAPIS Semiconductor ML7831 IOH
        i2c-eg20t: modified the setting of transfer rate.
        i2c-eg20t: use i2c_add_numbered_adapter to get a fixed bus number
        i2c: OMAP: Add DT support for i2c controller
        I2C: OMAP: NACK without STP
        I2C: OMAP: correct SYSC register offset for OMAP4
      aa303f2c
    • Linus Torvalds's avatar
      Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · 4a7c1ff2
      Linus Torvalds authored
      * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (57 commits)
        [media] as3645a: Fix compilation by including slab.h
        [media] s5p-fimc: Remove linux/version.h include from fimc-mdevice.c
        [media] s5p-mfc: Remove linux/version.h include from s5p_mfc.c
        [media] ds3000: using logical && instead of bitwise &
        [media] v4l2-ctrls: make control names consistent
        [media] DVB: dib0700, add support for Nova-TD LEDs
        [media] DVB: dib0700, add corrected Nova-TD frontend_attach
        [media] DVB: dib0700, separate stk7070pd initialization
        [media] DVB: dib0700, move Nova-TD Stick to a separate set
        [media] : add MODULE_FIRMWARE to dib0700
        [media] DVB-CORE: remove superfluous DTV_CMDs
        [media] s5p-jpeg: adapt to recent videobuf2 changes
        [media] s5p-g2d: fixed a bug in controls setting function
        [media] s5p-mfc: Fix volatile controls setup
        [media] drivers/media/video/s5p-mfc/s5p_mfc.c: adjust double test
        [media] drivers/media/video/s5p-fimc/fimc-capture.c: adjust double test
        [media] s5p-fimc: Fix incorrect control ID assignment
        [media] dvb_frontend: Don't call get_frontend() if idle
        [media] DocBook/dvbproperty.xml: Remove DTV_MODULATION from ISDB-T
        [media] DocBook/dvbproperty.xml: Fix ISDB-T delivery system parameters
        ...
      4a7c1ff2
    • Linus Torvalds's avatar
      Merge branch 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 9278e634
      Linus Torvalds authored
      * 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ASoC: Wait for WM8993 FLL to stabilise
        ASoC: core - Free platform DAPM context at platform removal.
        ASoC: dapm - Fix check for codec context in dapm_power_widgets().
        ASoC: sgtl5000: update author email address
        ASoC: Fix DMA channel leak in imx-pcm-dma-mx2 driver.
      9278e634
    • Laxman Dewangan's avatar
      gpio: tps65910: Use correct offset for gpio initialization · 94bd2442
      Laxman Dewangan authored
      Using the correct gpio offset for setting the initial value
      of gpio when setting output direction.
      Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      94bd2442